JPS59166614A - Sealing equipment of skirt part in converter waste gas treating device - Google Patents

Abstract

PURPOSE:To prevent the dust settled to the bottom part of water seal part from being accumulated and hardened, by installing under tension the chain, in a reciprocating manner, moving in the bottom part of water seal part by the vertical motion of skirt to the sprockets respectively provided at a sealing cylinder and the skirt. CONSTITUTION:A water seal part 4 is arranged along the outer periphery of a skirt 3 sealing a converter 1 and a hood 2 and several pieces of pushing down sprockets 10 and several pieces of drawing up sprockets 11 are respectively provided outside the sealing cylinder 6 dipped into the water of this water seal part 4. Guide sprockets 12, 13 and 14 opposingly facing these sprockets 10 and 11 are equipped to the skirt 3, and the receprocating motion of the bottom part of water seal part is made possible by installing under tension chains 15 thereto. When the skirt 3 is made to descend thereby, the chain 15 of pushing down sprocket 10 is loosened and the chain 15 of drawing up sprocket 11 is stretched. The chain 15 is moved in the bottom part of water seal part and the dust is is agitated to floating state. Further, when the skirt 3 is made to ascend, the chain 15 is moved in the reverse direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealing device for a skirt in converter exhaust gas treatment equipment, and more particularly, to a sealing device for a skirt that solves the problem of dust accumulating on the sealing portion.

CO gas generated from the converter during refining is drawn into an exhaust gas treatment device, cooled and dust removed, and then recovered as a valuable gas.

In most cases, this CO gas is extremely dangerous if it leaks to the outside, and there is a risk of explosion if outside air enters the treatment equipment, so seals are important for exhaust gas treatment equipment.In addition, seals are important for converter operation. The process involves tilting the converter to receive the hot metal produced in the blast furnace, and the converter and exhaust gas treatment equipment (7).
- a refining process of decarburizing by sealing the gap between the
After refining, three steps are carried out: tapping to remove any remaining hot metal in the converter.

The skirt used in converter exhaust gas treatment equipment is installed to seal the converter and the hood during refining, and when tilting the converter in the pig iron receiving and tapping processes, the skirt The skirt is moved upward to allow full tilting of the converter, and during refining, the skirt is lowered to seal the space between the converter and the hood.

As described above, the skirt needs to be able to move up and down and at the same time be sealed, and these two functions are required.

The sealing device for the skirt portion of a conventional converter exhaust gas treatment device has a structure as shown in FIG.

In the figure, the space between converter 1 and door 2 is sealed by a skirt 3. This skirt 3 is moved up and down by a cylinder ENC.

The seal part of this skirt 3 is provided with 4 water seal parts each having a U-shaped cross section on the outer periphery of the skirt 3. The water seal parts are filled with water, and the tip of the seal cylinder 6 fixed to the floor 9 is submerged in the water seal part 4. The skirt 3 was immersed in water to provide both vertical movement and sealing functions for the skirt 3. Note that 5 is a drain groove provided on the outer periphery of the water seal portion 4.

In the conventional skirt sealing device having such a configuration,
Exhaust gas that contains a large amount of dust such as iron powder during refining is caused by the gap force between the hood 2 and the skirt 3 as shown in the arrow, and the dust that leaks until the skirt 3 comes close to the converter 1 is also released as shown in the arrow. The dust that enters the seal part during this process and enters with the exhaust gas falls into the water seal part 4 or forms a layer on the inner and outer surfaces of the seal cylinder 6, causing the skirt 3 to rise. When this occurs, the dust is washed away by the seal water and settles to the bottom of the water seal section 4, forming a dust deposit 7.

If the dust layer 70 accumulated in this manner becomes high, the tip of the seal cylinder 6 will protrude into the dust layer 7, making it impossible for the skirt 3 to rise. As a result, it became impossible to tilt the converter, making it impossible to perform the pig iron receiving and tapping processes, resulting in the disadvantage that the converter operation had to be interrupted.

In addition, it is a difficult task to remove the dust once it has accumulated, and not only does it require a great deal of effort, but it also has the drawback of reducing the operating efficiency of the converter, resulting in a large loss of money.

The present invention has been made in view of the above-mentioned conventional dust trouble 5-2, and aims to provide a skirt sealing device that eliminates dust accumulation on the bottom of the water seal.゛That is, the present invention is designed to actively stir the dust that accumulates at the bottom of the water seal part to eliminate the dust accumulation and eliminate the dust trouble. A sprocket and a sprocket for raising the entire chain are provided, a sprocket for guiding is provided corresponding to both tin rockets, a chain is wound around these sprockets, the chain is stretched at the bottom of the water seal, and the skirt is The entire chain stretched over the bottom of the water seal is reciprocated by using a vertical motion mechanism to actively stir all the dust settling at the bottom of the water seal, thereby preventing the accumulation of dust. An embodiment of the present invention will be described in detail below. In FIG. 2, 1 is a converter, 2 is a hood, and a skirt 3 seals the space between them. Reference numeral 4 denotes a water seal portion having a U-shaped cross section provided on the outer periphery of the skirt 3, and the tip of the seal cylinder 6 is immersed in this water seal portion 4 to form a water seal. Note that 5 is a drain, 8 is a cylinder for moving the skirt 3 tray up and down, and 9 is a floor.

10 is a push-down sprocket, and 11 is a pull-up sprocket, which are attached to the outside of the seal cylinder 6. Further, 12, 13, and 14 are guide sprockets, which are attached to the skirt 3. 15 is a chain, as shown in FIGS. 2 to 4, the push-down sprocket 1
0, pulling sprocket 11 and guide sprocket)
12, 13, and 14, and is stretched on the bottom of the water seal part 4.

Also, a push-down sprocket 10 and a pull-up sprocket 1
1 are alternately arranged at ↓9 shown in FIGS. 3 and 4.

Next, the entire operation of this embodiment constructed as described above will be explained.

As shown in Fig. 1, exhaust gas from the converter 1 generated during refining passes through the gap between the hood 2 and the skirt 3 and the gap between the converter 1 and the skirt 3, and enters the seal part in the direction of the arrow. . The dust accompanying this exhaust gas forms a layer inside the water seal portion 4 or on the inner and outer surfaces of the seal cylinder 6.

The dust layered on the inner and outer surfaces of the seal cylinder 6 is washed away by the vertical movement of the skirt 3 and settles at the bottom of the water seal part 4.

The ten-thousand chain 15 moves back and forth at the bottom of the water seal section 4 due to the vertical movement of the skirt 3, and the dust settling at the bottom is stirred, and the dust with a specific gravity of /J% floats and overflows from the water seal section 4. It rides on the water flow and is discharged into the drainage ditch 5. Further, dust having a large specific gravity is stirred by the reciprocating motion of the chain 15 and becomes suspended, so that hard dust does not accumulate.

Referring to FIG. 4, the reciprocating movement of the chain 15 will be explained. The figure shows the state in which the skirt 3 is lowered (arrow), and by lowering the skirt 3, the seal cylinder 6
The lifting sprocket 11 and the pushing sprocket 10 fixed to the
5, and due to the balance between this loosening and the tension, the chain 15 moves in the direction of the arrow at the bottom of the water seal part 4.

When the reverse E skirt 3 is fully raised, the push-down sprocket 10 acts to pull the chain 15Vc, and the pull-up tin rocket 11 acts to loosen it, and due to the balance between this tension and loosening, the chain 15 acts on the water seal section 4. In this way, the vertical movement of the skirt 3 causes the chain 15 stretched at the bottom of the water seal part 3 to reciprocate, preventing dust from being agitated and deposited. As described above, the skirt sealing device of the present invention is provided with a push-down sprocket, a pull-up sprocket, and a guide sprocket, and the entire chain is wrapped around these sprockets, and the chain is stretched at the bottom of the water sealing part. Chain using motion? Because of the reciprocating motion, the dust that settles at the bottom of the water seal is actively stirred, and the dust with low specific gravity is discharged into the drain by overflow water, and the dust with high specific gravity is stirred by the chain and deposited. There's nothing to do. As a result, the tip of the seal cylinder does not come into contact with the dust, but plunges into the floating dust layer, making it possible to reliably move the skirt up and down, preventing interruptions in converter operation due to dust problems. This has the excellent effect of significantly improving converter operating efficiency.

[Brief explanation of the drawing]

Figure 1 shows the conventional skirt seal! The longitudinal cross-sectional views shown in FIGS. 2 to 4 show an embodiment of the skirt sealing device of the present invention, FIG. 2 is a longitudinal cross-sectional view thereof, and FIG. FIG. 4 is a plan view showing the relationship between the two, and FIG. 4 is a diagram showing the winding of the chain and the operating state. 1°゛°Converter 2...7-do 3...Skirt 4...Water seal part 5...Drain groove 6...Seal cylinder 10...Sprocket for pushing down 11...Lifting 12, 13, 14... Guide sprocket) 15... Chain applicant Kawasaki Heavy Industries, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] A water seal is installed around the outer circumference of the skirt of the converter exhaust gas treatment equipment,
In the sealing device of the skirt part, which seals by immersing the entire tip of the seal cylinder in this water seal part, it is compatible with the chain pulling sprocket and the chain pushing down sprocket provided on the outer periphery of the seal cylinder, as well as both of the above sprockets. The chain consists of a chain guiding sprocket and a chain wrapped around the guiding sprocket and tensioned at the bottom of the water seal. A sealing device for a skirt section in a converter exhaust gas treatment facility, characterized by a chain stretched across the bottom of a water seal section that moves all the way back and forth.